Bracket insulator



Feb. 26, 1935. w. c. BANKS BRACKET INSULATOR Filed July 29, 1932ATTORNEY Patented Feb. 26, 1,992,284

UNITED STATES PATENT OFFICE BRACKET INSULATOR William 0. Banks, JerseyCity, N. J.

Application July 29, 1932, Serial No. 625,855 3 Claims. (01. 173-314)This invention relates to bracket insulators used The strap-like part Bof the bracket is prefto support electric power conveying lines fromerably separably and hingedly fastened to the poles and the like. Ibracket shank 12 by means of a T-head 20 sup- One object of theinvention is to devise a brackported from the strap B by means of a bentneck 5 et which is easier for the lineman to handle, esportion 21. Thelocking T-head 20 which is pref- 5 peoially when he is up a pole andready to place erably T-shaped, is threaded through a slot 22 thebracket in permanent position. Another more in the shank 12 in a way topermit pivotal moveprecise object is to arrange the component parts mentbetween the shank 12 and strap B in more of the bracket and itsinsulator so that there will than one plane, as shown in dotted lines inFigbe permitted a certain amount of relative moveure 2. 1 1O ment of theparts when being assembled, without In order that the curved part 13 ofthe bracket their falling apart, during manipulation thereof 4 and thestrap B may each carry an insulator by the lineman. A still furtherobject is to propart without danger of disassembly of the invide thebracket with its operating parts arranged sulatorpart from its bracketpart, each insulator 15 to be most conveniently treated by the lineman.part isprovided with a groove 23 in which may r One feature of theinvention may be said to be seated the bracket part. So that this seatedconsist in providing a multi-part bracket and a relationship may bemaintained, each insulator multi-part insulator with a connectionbetween part is provided with means for loosely, slidably one bracketpart and one insulator part whereby or adjustably looking to itscarrying bracket part,

one is locked to the other in a way to permit slight such as fingers 24and preferably integral with 20 relative movement or adjustment. Anotherfeathe insulator body extending toward each other ture resides in themanner of securing the bracket over the groove 23 from the end or headportions parts together whereby prior to the final positionof theinsulator I. ing of the parts in permanent position, the brack- Thisrelationship is brought about by threading 25 et parts with theinsulator partslocked thereto, the lug end 16 of the strap B between thefingers 25 are capable of adjustment in more than one plane 24 and 25 ofinsulator part 17. So that this operawithout the various parts becomingdisassembled. tion may be made easy, the fingers may be round- Theinvention possesses other objects and feaed in cross-section, orstreamlined, whereby jamtures of advantage, some of which, with theforeming is prevented of the strap in the groove 23 going, will be setforth in the following descripduring the threading operation. The sameholds 30 tion of my invention. In the accompanying drawtruefortheassembling of the curved part 13 of ing, I have illustrated the bestembodiment of the other bracket part and its associated insulator myinvention known to me, but such embodiment 18. is to be regarded astypical only of many possi- After each bracket part has been providedwith ble embodiments and my invention is not to be the insulator part itis to carry clinging thereto, 35 limited thereto. the strap part Bishinged to the shank 12 by turn- Figure 1 shows aperspective view of theinsulating the strap at right angles to the shank and ing bracket ofthis invention. Figure 2 shows a threading the T-head 20 through theslot 22 in the top plan view thereof with parts in section. Figshank.The strap B is then turned to be parallel ure 3 shows a verticalsectional view taken along to the shank and the lugs 14 and 16 may thenbe 40 the line 3-3 in Figure 2 while Figure 4 shows a temporarily boltedtogether as at 26. fragmentary side view of the hinge connection be- Inthis position, the insulated bracket is carried tween the bracket parts.aloft by the lineman. When he is ready to install The insulated bracketis composed principally the bracket on the pole, he fastens the base 11of a base plate 11 usually curved for attachment by means such as lagscrews. Next he unbolts the 45 to a pole or other support, from whichextends a parts in order to encircle the conduit 19 with the shank 12having a curved portion 13 terminating insulator and the parts take therelationship in a lug-like end 14. A second or strap-like part shown indotted lines in Figure 2. But the strap B of the bracket is hingedlysecured to the bracket B will not fall away from the bracket shank, and

shank 12 and provided with a curved portion 15 the insulator parts willnot fall away from their 50 and an end leg 16. These curved portions arecarrying bracket parts even during considerable adapted to clamp betweenthem an insulator I relative movement of all of these parts by thelinecomposed of two parts 1'7 and 18. The electric man in encircling thepower conduit with the inconductor 19 is gripped between the insulatorsulator parts. After such placement, the lineman 56 parts, secures theparts in permanent position by bolting at 26 the lug ends 14 and 16. Theadjustable or slidable mounting of the insulator parts in the bracketelements permits shifting of the insulator in its bracket if necessary,and the loose connection allows for expansion and contraction of theparts.

By locating the hinge connection for the bracket parts between theinsulator and the base, they are protected from inadvertent displacementby the lineman in the manipulation of the parts or in the handling ofhis tools. And by locating the bolting arrangement beyond the insulator,the bolting is facilitated.

I claim:

1. A bracket insulator for supporting a current line or wire having amulti-part bracket for attachment to a support such as a pole, amultipart insulator for encircling the wire, and means for securing thebracket and insulator together in functioning position characterized byan arrangement for movably securing one insulator part to one bracketpart and for movably securing together the bracket parts while eachbears an insulator part whereby a lineman can ascend a pole with all theparts secure against disassembly but yet loosely connected to permitattachment of the bracket to the pole and to permit the encircling ofthe wire by the insulator together with adjustment of the insulator whenin wire-encircling position in relation to the insulator supportingbracket parts, said arrangement comprising a grooved section of saidinsulator located between a head on each end thereof whose diameter isgreater than the grooved section, a pair or fingers on each insulatorpart with each ringer integral with a head projecting therefrom towardthe opposite head, said fingers being spaced from each other and fromthe grooved section, each bracket part having adjustably carried therebyan insulator part wherein the bracket part extends into the groovedsection of the insulator and is gripped by a pair of said fingers, meansfor detachably but incompletely securing said bracket parts togetherwhile permitting adjustment between the parts, and means for completelyand rigidly locking said bracket parts together while looking theinsulator parts for some rotational adJustment located at the extremityof the bracket farthest from its support for easy access by the lineman.

2. A bracket insulator for supporting a current line or wire formed inat least two parts for attachment to a support such as a pole, amulti-part insulator for encircling the wire formed with two headportions with a groove therebetween and fingers extending from each ofsaid head portions over said groove, said bracket having portionslocated in said groove and beneath said fingers, and means for securingthe bracket and insulator together in functioning position characterizedby an arrangement for movably securing together certain of the bracketparts with an insulator part attached to each bracket part whereby thelineman can ascend a pole with the parts secure against disassembly butyet loosely connected to permit attachment of the bracket to the poleand to permit the encircling of the wire by the insulator, saidarrangement comprising a base-plate for attachment to a pole, a bracketshank adapted to carry one of the insulator parts extending from saidbase-plate provided with a curved portion terminating in an end lug, asecond bracket part or strap adapted to carry another insulator parthaving a curved portion terminating in an end lug and at the other endin a T-head, said bracket shank having a slot between its curved portionand said baseplate into which said T-head is adapted to fit forpermitting pivotal movement between the shank and the strap in more thanone plane while each of said shank and strap has clinging thereto aninsulator part, and bolt means for rigidly securing together the saidend lugs at the extremity of the bracket distant from the baseplate forclamping said insulator parts together in wire gripping and encirclingposition.

3. A bracket insulator as defined in and by claim 1 and which isconstructed so that a bracket part has a curved body section and anarrow section at an end of the body section and in respect to whichbracket part the corresponding insulating part can be assembled by aninitial movement during which the fingers oi insulating part pass oversaid narrow section of said bracket part and which initial movement isfollowed by a rela tive turning movement of the corresponding insulatingpart within the curved body section and which turning movement causesthe fingers to pass over the curved body section whereby the bracketpart and the corresponding insulating part are held assembled.

WILLIAM C. BANKS.

